Software Engineer II, iOS, Growth

Our mission at Duolingo is to develop the best education in the world and make it universally available. It’s a big mission, and that’s where you come in!

At Duolingo, you’ll join a team that cares about educating our users, experimenting with big ideas, making fact-based decisions, and finding innovative solutions to complex problems. You’ll have limitless learning opportunities and daily collaborations with world-class minds — while doing work that’s both meaningful and fun.

Join our life-changing mission to develop education for our half a billion (and growing!) learners around the world.

Read our blog to learn more.

About the role...

We’re looking for an iOS Software Engineer II to join our Momentum team under the International Growth area. In this role, you’ll build and ship features that drive user growth and deliver high-quality learning experiences to millions of learners worldwide. You’ll work closely with product managers and designers to create engaging experiences for users.

You’ll gain experience working on iOS, running experiments, and collaborating cross-functionally to improve key metrics like daily active users (DAU).

🧠 You will...

• Collaborate with product managers and designers to drive user growth
• Develop, release, and maintain native iOS applications, primarily in Swift
• Contribute to code reviews and collaborate across teams to ensure quality and scalability

✅ You have...

• A Bachelor’s degree in Computer Science or a related technical field
• A solid foundation in computer science with strong competencies in data structures, algorithms, and software design
• 2–5 years of experience programming in Swift
• Dedication to our mission of universally available education
• Relocation to Beijing, China. This position is based in Beijing.

⭐ Exceptional candidates will have...

• Strong proficiency in Swift, with proven ability to build and maintain production-level applications
• Strong technical knowledge of iOS mobile application development for iPhone/iPad using Swift with Cocoa Touch and related frameworks
• Experience designing clean and maintainable APIs
• Proficient in both spoken and written English.

The offered salary is dependent upon several factors, including work experience, skills, and internal peer comparisons. The posted range is subject to change in the future. For this role, base salary is supp